{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-86478", "assignerOrgId": "547ada31-17d8-4964-bc5f-1b8238ba8014", "state": "PUBLISHED", "assignerShortName": "JetBrains", "dateReserved": "2026-09-07T16:13:33.299Z", "datePublished": "2026-09-07T16:26:40.709Z", "dateUpdated": "2026-09-07T16:26:40.709Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "547ada31-17d8-4964-bc5f-1b8238ba8014", "shortName": "JetBrains", "dateUpdated": "2026-09-07T16:26:40.709Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-290", "cweId": "CWE-290"}]}], "affected": [{"vendor": "JetBrains", "product": "YouTrack", "versions": [{"version": "0", "status": "affected", "lessThan": "2025.3.161254, \n2026.1.14042", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "In JetBrains YouTrack before 2025.3.161254, \n2026.1.14042 improper authentication in YouTrack Helpdesk allowed unauthenticated account takeover via a self-asserted email address"}], "references": [{"url": "https://www.jetbrains.com/privacy-security/issues-fixed/"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "YouTrack", "vendor": "JetBrains", "versions": [{"lessThan": "2025.3.161254, \n2026.1.14042", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "cve@jetbrains.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In JetBrains YouTrack before 2025.3.161254, \n2026.1.14042 improper authentication in YouTrack Helpdesk allowed unauthenticated account takeover via a self-asserted email address"}], "id": "CVE-2026-86478", "lastModified": "2026-09-07T17:17:25.920", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "cve@jetbrains.com", "type": "Secondary"}]}, "published": "2026-09-07T17:17:25.920", "references": [{"source": "cve@jetbrains.com", "url": "https://www.jetbrains.com/privacy-security/issues-fixed/"}], "sourceIdentifier": "cve@jetbrains.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-290"}], "source": "cve@jetbrains.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2025.3.161254)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2026.1.14042)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "YouTrack", "source": "cna", "vendor": "JetBrains"}, "product": "youtrack", "vendor": "jetbrains"}], "created": "2026-09-07T17:30:06.281743+00:00", "title": "Unauthenticated Account Takeover via Self\u2011Asserted Email Authentication in YouTrack Helpdesk", "updated": "2026-09-07T17:45:17.342360+00:00", "vendors": ["jetbrains", "jetbrains$PRODUCT$youtrack"]}